Valve



May .28, 1946 A. s. voLPlN 2,401,1'23

l y Y VALVE l Filed Jan. 3, 1944. 2 sheetsfshee't 2 f atented 28,1946

ascites VALVE Alexander S. Volpn, Houston, Text., assigner to Garz-ott Brass and Mace Company, Houston, Tex., a corporation of Texas i Application January 3, lodi, Serial No. 516,751

7 Claims.

The invention relates to a valve for closing the iiovr in a pipe, wherein the valve can be readily assembled and disassembled and any desired pressure applied thereto to eiect a sealing of the valve due to the fact that the sealing portions lthereof are completely confined and oi resilient materials so that the pressure is uniformly distributed therethrough.

it is one or the. objects of the invention to provide a valve closure wherein the closure member is completely sealed by a confined resilient material in which a pressure in excess of the pressure being sealed can be established.

Another object of the invention is to provide a resilient saddle seat for gate valves to provide a seal thereabout.

Another object of the invention is to provide a resilient gate valve seat in combination with a resilient cap movable with the gate so `as-to establish a predominant pressure in the resilient sealing material as'the gate moves to closed po-1 sition.

Another object of the invention is to provide a valve comprising an open y with closure anges at each end thereof so as to facilitate assembly and repair of the valve construction.

Another object of the invention is to provide a two part sealing assembly for gate valves Wherein one part is carried by the gate member and forced against the other part of the sealing assembly and the `Whole confined by the movement of the gate valve to establish a sealing pressure.

Other and further objects of the invention will be readily apparent whenthe following description is considered in connection with the accompanying drawings wherein;

Fig. 1 is a vertical sectional view of -the valve of the invention with th gate in open position.

Fig. 2 is a section similar to Fig. l with the gate in closed position. l

Fig. 3 is a side elevation with certain parts in section to illustrate the gate in closed position.

Fig. i is a section taken on the line t-t of Fig. 3.'

Fig. 5 is a perspective view of the gate and the conning cap plate.

Figs. 6 and 'l illustrate the complementary segments making up the cap sealing member.

Fig. 3 is a perspective View of the sealing saddle which is to receive the gate member.

In Fig. 1 the valve is illustrated generally at l 'I and is made up of a body 2 which has an opening 3 extending entirely therethrough. This body may be of any desired conguration, but as seen in Fig. 41s substantially rectangular. This body (Si. E-MSH has a packing groove l at each end thereof to receive a packing ring El whereby a seal is formed with the bottom ange or closure plate t and the upper flange or closure 'plate l. ri'he body or closure plate t is shown as being dat and having a rib 9 thereon to t into the groove i to compress the packing when the two plates 't and 'l are drawnrmly against the body 2 by the series of bolts and nuts iii. The upper iiange plate i has asimilar ridge t which forms a seal at the 'top of the body.

When these parts are thus assembled the gate chamber iii is formed and is arranged to receive the cylindrical gate .it carried by the stem il which is in turn supported in the bonnet portion it formed on the top ange l. A packing E@ deposited in the recess 2l and conned by the plate 22 and the sleeve 'it serves to form a seal about the stem il. The hand Wheel it has the extension to thereon which has complementary threads 36 to engage the threads 2l on the stem so that rotation or the wheel causes raising and lowering of the stem` il'. A hold down bushing 2t ls threaded at 2t on the bonnet it and the it@ antifriction bearings 2S assist in the ready rotaaround the gate member into the tapered wallsV tion of the hand wheel. It seems obvious that by rotating the hand wheel the gate i3 will be raised or lowered to cover or uncover the ports 35 which disposed on the bottom ange d inside of the l chamber i2 so as to serve as a supportfor the resilient saddle member di. This saddle member is best seen in perspective in Fig. 8 and is made up oi a`- body oi resilient material having a rectangular or other coniiguratlon to fit the gate chamber i2. The outer faces d2 of this saddle member are plain faces to lt and form a seal with the faces of the body 2 and the support plate to. l

The saddle di is formed with a curved seat i3 which merges with the straight inclined faces dit to form what may be designated as a rounded .V configuration. The curved surface di is of the same curvature as the lower peripherial surface to of the gate it so that as the gate moves to the closed position seen in Fig. 2 the resilient material of the saddle will be compressed and causedto 4iovv in all directions upwardly and t1 or the saddle member.

carriedby the valve stem Il as seen in Fig. 5.v

This cap plate is preferably fixed on the -valve stem and the resilient sections are slipped in laterally to the assembled position of Figs. 1 and 3. The ends 58 of these curved sections 5i and e2 are inclined at substantially the same angle as the fiat faces de on the saddle member and tapered down to a thin edge at 59 which is substantially tangent, with the curvature of the gate member` i3. The cap plate 51 overlies these resilient sections so that when the gate member moves to the closed position oi Fig. 2 that additional downward movement of the gate member tends to caum the cap plate 5l to confine the sealing assembly comprising the saddle il and the sections 5| and 52. It seems obvious that by turning the hand wheel 2t a desired pressure can be imparted to this sealing material due to the fact that it is completely confined and that where this pressure imparted to the sealing material exceeds the pressure in the ow line at the ports 35 that there will be a complete sealing or closure of the valve. This is true because as ther gate engages the cuwed portion la the resilientmaterial wi11 be displaced causing the faces di to bulge and engage the ends 58 of the cap sections 5i and 52 so that the confining action of the cap plate 5l causes the imparted pressure to be established in the cap sections as well as the saddle.

Fig, 3 shows an edge elevation where the ports 35 are formed by a replaceable ring 36. It seems obvious that the entire assembly adapts itself to ready replacement of the parts. `If the saddle is to be replaced the bottom plate e can be readily removed and a new saddle inserted or the wear rings 36 atthe ports can be replaced. 0n the other hand if the gate or any of its assembled parts are to be replaced the top ange l may be removed and suitable repairs accomplished including the replacement of sections El and 52.

Broadly the invention contemplates a simple and economical construction wherein a maximum sealing is effected and all of the parts subject to wear are readily replaceable.

What is claimed is:

1. A valve comprising a body having a, gate chamber extending therethrough, a pair of aligned flow ports in said body, top and bottom iiange closure plates applied to the ends of said body, a gate stem sealing and moving assembly carried by the top plate, a stem extending therethrough, a gate on said stem of a configuration to close said ports, a sealing saddle of resilient material disposed in said chamber on said botancrage tom plate and having a curved seat with inclined side walls to receive said gate as it moves to cle/se said ports so as to provide a seal about the lower f portion of the gate, a sealing cap carried by said stem and gate and having its ends shaped to contact said side walls, and a retainer cap overlying said sealing cap to conne said saddle and cap receive the lower portion of the gate member, a

sealing cap assembly including a resilient portion, and cooperating smooth sealing faces on said saddle and portion to provide a seal of resilient material about the gate member.

3. In a gate valve having a gate chamber therein, a ow passage through the valve, a resilient saddle seat for the gate member in said chamber below the valve ow passage, said saddle having a rounded seating face to receive the lower portion of the gate member, a sealing cap assembly carried by the gate member and including ak resilient portion, and cooperating smooth sealing faces on said saddle and portion to provide a seal of resilient material about the gate member, said assembly including a. rigid member movable with the gate to confine said sealing material and establish a pressure therein in excess of the pressure being valved.

4. In a gate valve, a cylindrical gate, a. stem affixed radially thereof to move said gate, and a co-axial sealing cap assembly on the gate.

5.*In a gate valve, a cylindrical gate, a stem afiixed radially thereof to move said gate, and a co-axlal sealing cap assembly on the gate, including a curved cap plate and a resilient sealing portion extending about the upper periphery of said gate.

6. In a gate valve a resilient sealing assembly to enclose the gate member in closed position including a base saddle having a curved sealing face for the valve gate and fiat sealing faces extending therefrom, and a sealing cap having a resilient portion to nt about the remainder of th gate and to seal with said fiat faces.

7. A valve comprising a body, a valve chamber therein, a resilient sealing member disposed in the base of said chamber, a valve member shaped to t said sealing member and to engage therewith, a second sealing member disposed lon top of said valve member and fitted thereabout and to also engage said first sealing member, means to move said valve member to close the flow ports, and additional means on said valve member and movable therewith to cooperate with said body to confine said sealingmembers in position enclosing the transverse periphery of said valve member.

- ALEXANDER S. VQLPIN. 

